1 to 10 of 261 Results
Jan 1, 1993
Bar-Cohen, Y., 1993, "Nondestructive Characterization of Composite Materials", https://hdl.handle.net/2014/35899, UNKNOWN, JPL Open Repository
Increasingly, composite materials are applied to fracture-critical structures of aircraft and spacecraft...Ultrasonics offer the most capable inspection technology and recently developed techniques appear to improve this technology significantly... Recent progress in ultrasonic N... |
Apr 19, 1993
Mal, A. K.; Lih, S.-S.; Bar-Cohen, Y., 1993, "Nondestructive Characterization of the Elastic Constants of Fiber Reinforced Composites", https://hdl.handle.net/2014/34953, La Jolla, California, USA, JPL Open Repository
Composite structural components may be subjected to a variety of defects resulting in a sharp reduction in their load carrying capacity or even catastrophic failure...A nondestructive method based on ultrasonics has recently been developed for the quantitative evaluation of compo... |
May 11, 1993
Bar-Cohen, Y., 1993, "NDE Activity at Jet Propulsion Laboratory", https://hdl.handle.net/2014/35296, Downey, California, USA, JPL Open Repository
None, This is a viewgraph outline from an oral presentation. From Intro.: Our speaker will review the NDE technology under development at the Jet Propulsion Laboratory (JPL). Emphasis will be given to Ultrasonics and application of sensors to space technology. Further, the effort... |
Aug 1, 1993
Mal, A.K.; Lih, S.-S.; Bar-Cohen, Y., 1993, "Characterization of the Elastic Constants of Unidirectional Laminates by Oblique-Incidence Pulsed Data", https://hdl.handle.net/2014/35341, Bronswick, Maine, USA, JPL Open Repository
No abstract provided |
Aug 1, 1993
Mal, A.K.; Lih, S.-S.; Bar-Cohen, Y., 1993, "Characterization of the Elastic Constants of Unidirectional Laminates Using Oblique-Incidence Pulsed Data", https://hdl.handle.net/2014/35651, Brunswick, Maine, USA, JPL Open Repository
From Intro: In this paper, wer apply the LLW (leaky Lamb Wave) technique to determine the stiffness constants of unnidirectional graphite/epoxy materials...In this paper, we describe a new technique which can be used to determine all five stiffness constants by analyzing the time... |
Jan 1, 1994
Bar-Cohen, Y., 1994, "NASA NDE Working Group (NNWG)", https://hdl.handle.net/2014/34450, UNKNOWN, JPL Open Repository
In April 1993, a group of more than 20 NDE specialists representing all the NASA Centers have met at the Johnson Space Center (JSC) in Huston Texas and formed the NSAS NDE Working Group(NNWG). |
Jan 1, 1994
Bar-Cohen, Y., 1994, "ASNT Visit to JPL", https://hdl.handle.net/2014/32271, UNKNOWN, JPL Open Repository
No abstract provided |
Jan 1, 1994
Bar-Cohen, Y., 1994, "NASA NDE Working Group Newsletter, Vol. 2, No. 1", https://hdl.handle.net/2014/32426, UNKNOWN, JPL Open Repository
Contents: NASA HQ Message, NNWG Highlights, Current Evens and Action Items, NASA Centers News and Announcements, Coming Events |
Feb 20, 1994
Mal, A.; Lih, S-S.; Bar-Cohen, Y., 1994, "Nondestructive Characterization of Adhesive Bonds from Guided Wave Data", https://hdl.handle.net/2014/36519, ['17th Annual Adhesive Society', 'Orlando, Florida, USA'], JPL Open Repository
The critical role played by interface zones in the fracture and failure of composites and other bonded materials is well known. The existing nondestructive evaluation methods are generally not capable of yielding useful quantitative information of the strength of an interface. |
Apr 1, 1994
Bar-Cohen, Y., 1994, "NASA NDE Working Group Newsletter (Vol. 2, No. 2)", https://hdl.handle.net/2014/33963, UNKNOWN, JPL Open Repository
Contents: NASA HQ CODE Q, NASA HQ Code QW Message, New NDE Manager, NNWG Highlight, Current events and Action Items, NASA Centers News and Announcements |
